/**
 * 
 */
package com.ufgov.zc.client.zc.test;

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

/**
 * @author Administrator
 *
 */
public class ExcelOperate {
  public static void main(String[] args) throws Exception {

    File file = new File("ExcelDemo.xls");

    String[][] result = getData(file, 1);

    int rowLength = result.length;

    for (int i = 0; i < rowLength; i++) {

      for (int j = 0; j < result[i].length; j++) {

        System.out.print(result[i][j] + "\t\t");

      }

      System.out.println();

    }

  }

  /**

   * 读取Excel的内容，第一维数组存储的是一行中格列的值，二维数组存储的是多少个行

   * @param file 读取数据的源Excel

   * @param ignoreRows 读取数据忽略的行数，比喻行头不需要读入 忽略的行数为1

   * @return 读出的Excel中数据的内容

   * @throws FileNotFoundException

   * @throws IOException

   */

  public static String[][] getData(File file, int ignoreRows)

  throws FileNotFoundException, IOException {

    List<String[]> result = new ArrayList<String[]>();

    int rowSize = 0;

    BufferedInputStream in = new BufferedInputStream(new FileInputStream(

    file));

    // 打开HSSFWorkbook

    POIFSFileSystem fs = new POIFSFileSystem(in);

    HSSFWorkbook wb = new HSSFWorkbook(fs);

    HSSFCell cell = null;

    for (int sheetIndex = 0; sheetIndex < wb.getNumberOfSheets(); sheetIndex++) {

      HSSFSheet st = wb.getSheetAt(sheetIndex);

      // 第一行为标题，不取

      for (int rowIndex = ignoreRows; rowIndex <= st.getLastRowNum(); rowIndex++) {

        HSSFRow row = st.getRow(rowIndex);

        if (row == null) {

          continue;

        }

        int tempRowSize = row.getLastCellNum() + 1;

        if (tempRowSize > rowSize) {

          rowSize = tempRowSize;

        }

        String[] values = new String[rowSize];

        Arrays.fill(values, "");

        boolean hasValue = false;

        for (short columnIndex = 0; columnIndex <= row.getLastCellNum(); columnIndex++) {

          String value = "";

          cell = row.getCell(columnIndex);

          if (cell != null) {

            // 注意：一定要设成这个，否则可能会出现乱码

            cell.setEncoding(HSSFCell.ENCODING_UTF_16);

            switch (cell.getCellType()) {

            case HSSFCell.CELL_TYPE_STRING:

              value = cell.getStringCellValue();

              break;

            case HSSFCell.CELL_TYPE_NUMERIC:

              if (HSSFDateUtil.isCellDateFormatted(cell)) {

                Date date = cell.getDateCellValue();

                if (date != null) {

                  value = new SimpleDateFormat("yyyy-MM-dd")

                  .format(date);

                } else {

                  value = "";

                }

              } else {

                value = new DecimalFormat("0").format(cell

                .getNumericCellValue());

              }

              break;

            case HSSFCell.CELL_TYPE_FORMULA:

              // 导入时如果为公式生成的数据则无值

              if (!cell.getStringCellValue().equals("")) {

                value = cell.getStringCellValue();

              } else {

                value = cell.getNumericCellValue() + "";

              }

              break;

            case HSSFCell.CELL_TYPE_BLANK:

              break;

            case HSSFCell.CELL_TYPE_ERROR:

              value = "";

              break;

            case HSSFCell.CELL_TYPE_BOOLEAN:

              value = (cell.getBooleanCellValue() == true ? "Y"

              : "N");

              break;

            default:

              value = "";

            }

          }

          if (columnIndex == 0 && value.trim().equals("")) {

            break;

          }

          values[columnIndex] = rightTrim(value);

          hasValue = true;

        }

        if (hasValue) {

          result.add(values);

        }

      }

    }

    in.close();

    String[][] returnArray = new String[result.size()][rowSize];

    for (int i = 0; i < returnArray.length; i++) {

      returnArray[i] = (String[]) result.get(i);

    }

    return returnArray;

  }

  /**

   * 去掉字符串右边的空格

   * @param str 要处理的字符串

   * @return 处理后的字符串

   */

  public static String rightTrim(String str) {

    if (str == null) {

      return "";

    }

    int length = str.length();

    for (int i = length - 1; i >= 0; i--) {

      if (str.charAt(i) != 0x20) {

        break;

      }

      length--;

    }

    return str.substring(0, length);

  }
}
